Telescopic rod antenna apparatus
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United States of America Patent
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-
Dec 14, 1999
Grant Date -
N/A
app pub date -
Mar 10, 1998
filing date -
Dec 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telescopic rod antenna apparatus of the present invention includes a mechanism for extending/retracting a telescopic antenna element by operating a smallest-diameter one of rods of the antenna element, and a means for setting the rods in the second state where a tip portion of a largest-diameter rod contacts an O-shaped ring seal means and then extending the antenna element using the mechanism, setting the rods in the second state where the antenna element is retracted using the mechanism, and displacing the second state to the first state where the largest-diameter rod is returned to the initial position of a holding tube to bring a top portion into contact with the O-shaped ring seal means.
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Cited Art Landscape
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